PGR and polycystic ovary syndrome: Compared to the control group of regularly cycling women, Paulson et al. (2017) [47] observed persistent higher expressions of PGR (A and B), PGRMC1 and PGRMC2 in the stroma and of PGRMC1 in the luminal epithelium on cycle days 21–23 in obese anovulatory women with PCOS [47].